Long-term stabilized two-beam combination laser amplifier with stimulated Brillouin scattering mirrors

The beam combination method is the promising technique for constructing a very high energy laser with a high repetition rate over 10Hz such as a real fusion driver. In our previous works, the phase control technique essential for realizing this system was proposed and demonstrated experimentally. However, these previous works were done without amplifiers. In this work, we employed amplifiers to test the real beam combination system and obtained a well stabilized phase controlling with λ∕51 fluctuation by standard deviation during 5000 laser shots (500s) at 204mJ total output energy.

[1]  N. G. Basov,et al.  Influence of certain radiation parameters on wavefront reversal of a pump wave in a Brillouin mirror , 1979 .

[2]  T. Riesbeck,et al.  A high power laser system at 540 nm with beam coupling by second harmonic generation , 2007 .

[3]  D. A. Rockwell,et al.  A review of phase-conjugate solid-state lasers , 1988 .

[4]  Hisanori Fujita,et al.  Very high energy SBS phase conjugation and pulse compression in fluorocarbon liquids , 2000, Advanced High-Power Lasers and Applications.

[5]  M. Martinelli.  A universal compensator for polarization changes induced by birefringence on a retracing beam , 1989 .

[6]  Thomas Riesbeck,et al.  Pulsed solid-state laser system with fiber phase conjugation and 315 W average output power , 2001 .

[7]  Hong Jin Kong,et al.  Great improvement of phase controlling of the entirely independent stimulated Brillouin scattering phase conjugate mirrors by balancing the pump energies , 2005 .

[8]  Robert W. Boyd,et al.  Phase locking via Brillouin-enhanced four-wave-mixing phase conjugation , 1998 .

[9]  Hong Jin Kong,et al.  Phase control of a stimulated Brillouin scattering phase conjugate mirror by a self-generated density modulation , 2005 .

[10]  Hong Jin Kong,et al.  Beam Combination using Stimulated Brillouin Scattering for the Ultimate High Power-Energy Laser System Operating at High Repetition Rate over 10 Hz for Laser Fusion Driver , 2006 .

[11]  Annette Schaper,et al.  Arms control at the stage of research and development? —The case of inertial confinement fusion , 1991 .

[12]  C R Giuliano,et al.  Coherent coupling of laser gain media using phase conjugation. , 1986, Optics letters.

[13]  H. J. Kong,et al.  Highly repetitive high energy/power beam combination laser: IFE laser driver using independent phase control of stimulated Brillouin scattering phase conjugate mirrors and pre-pulse technique , 2005 .

[14]  Jae Sung Shin,et al.  Laser fusion driver using stimulated Brillouin scattering phase conjugate mirrors by a self-density modulation , 2007 .

[15]  H. Fujita,et al.  Heavy fluorocarbon liquids for a phase-conjugated stimulated Brillouin scattering mirror. , 1997, Applied optics.

[16]  Yun Sup Shin,et al.  Beam combination characteristics in an array laser using stimulated Brillouin scattering phase conjugate mirrors considering partial coherency between the beams , 1999 .

[17]  Boyd,et al.  Noise initiation of stimulated Brillouin scattering. , 1990, Physical review. A, Atomic, molecular, and optical physics.

[18]  Roger O. Bangerter,et al.  Energy from Inertial Fusion , 1992 .

[19]  R A Fisher,et al.  Phase locking two beams by means of seeded Brillouin scattering. , 1987, Optics letters.

[20]  Efim Khazanov,et al.  Compensation of birefringence in active elements with a novel Faraday mirror operating at high average power. , 2002, Applied optics.

[21]  K Mima,et al.  Laser driven inertial fusion energy: present and prospective , 2004 .

[22]  J. W. Yoon,et al.  Long term stabilization of the beam combination laser with a phase controlled stimulated Brillouin scattering phase conjugation mirrors for the laser fusion driver , 2006 .

[23]  J. Kilkenny,et al.  The role of the National Ignition Facility in energy production from inertial fusion , 1999, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.

[24]  H. Kong,et al.  Waveform preservation of the backscattered stimulated Brillouin scattering wave by using a prepulse injection. , 2005, Optics letters.

[25]  Yun Sup Shin,et al.  Beam Recombination Characteristics in Array Laser Amplification Using Stimulated Brillouin Scattering Phase Conjugation , 1997 .